Brake disc



FIG. 1 is a perspective view of a brake disc showing my design.

FIG. 2 is a front view thereof; and,

FIG. 3 is a side view thereof, the opposite side view being a mirror image thereof.

The broken line showing is for the purpose of illustrating portions of the brake disc that form no part of the claimed design. 

CLAIM The ornamental design for a brake disc, as shown and described. 